content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.debug.multihook;
  
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  
  /**
   * Handles the OnSchedule hooks.
   * <p>
   * Use {@link #enable()} to install the single global RxJavaPlugins handler.
   * @since 0.18.0
   */
  public class OnScheduleMultiHandlerManager extends MultiHandlerManager<Function<Runnable, Runnable>>
  implements Function<Runnable, Runnable>,
  BiConsumer<Runnable[], Function<Runnable, Runnable>> {
  
      /**
       * Enables this manager by replacing any existing OnSchedule hook in RxJavaPlugins.
       */
      public void enable() {
          RxJavaPlugins.setScheduleHandler(this);
      }
  
      /**
       * Disables this manager by restoring a {@code null} OnSchedule hook.
       */
      public void disable() {
          RxJavaPlugins.setScheduleHandler(null);
      }
  
      /**
       * Adds the current non-null OnSchedule hook to this handler and replaces it
       * in RxJavaPlugins with this OnScheduleMultiHandlerManager.
       */
      public void append() {
          @SuppressWarnings("unchecked")
          Function<Runnable, Runnable> existing = (Function<Runnable, Runnable>)RxJavaPlugins.getScheduleHandler();
          if (existing != this) {
              if (existing != null) {
                  register(existing);
              }
              RxJavaPlugins.setScheduleHandler(this);
          }
      }
  
      @Override
      public Runnable apply(Runnable t) throws Exception {
          Runnable[] ref = { t };
          forEach(ref, this);
          return ref[0];
      }
  
      @Override
      public void accept(Runnable[] t1,
              Function<Runnable, Runnable> t2) throws Throwable {
          t1[0] = t2.apply(t1[0]);
      }
  }
  